Space Station >> Space Station Glossary
Space Station Glossary G
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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Galactic Center:
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The middle hub or nucleus of a galaxy. The Milky Way’s galactic middle is about 28,000 light-years from Earth
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Gamma Rays:
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Light with the straight wavelengths and the highest energies and frequencies in the electromagnetic range; also called gamma radiation.
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Galaxy:
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A collection of stars, gas, and also dust bound together by gravity. The smallest galaxies might contain only a few hundred thousand stars, while the main galaxies have thousands of billions of stars. The Milky Way galaxy holds our solar system.
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Geocentric:
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An adjective sense “centered on the Earth.” Most early civilizations had a geocentric view of the space.
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